Lock.



J. KAUFMAN.

LOCK. APPLlCATION FILED DEC-2.1915. 1,204,781 Patented Nov. 14, 1916.

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A TTOHWEY LKAU FMAN.

LOCK.

APPLICATION FILED DEC-2, I915. Patented Nov. 14 1916.

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UNITED STATESFPATENT OFFICE.

JOSEPH KAUFMAN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO JACOB WOLFSON.

LOCK.

Specification of Letters Patent. Patented N 14 1916,

Application filed December 2, 1915. Serial No; 64,?03.

New York, have invented a certain new and useful Improvement in Locks, of which the following is a full, clear, and exact specihcation. p

This invention relates more particularly to a class of locking devices.

My invention has for its object primarily to provide a lock designed to be employed for preventing doors and the like from being surreptitiously opened when locked, and which is of a form whereby it will be practically impossible to jimmy or pry open the parts of the lock when engaged in locking positions.

The invention consists essentially of a housing with an opening, and a separate bolt-plate with preferably three spaced alined openings. In the housing are two locking elements each substantially threequarters of a circle in shape, and both of these locking elements are movably mount-. ed in the housing for being movably guided in unison through the opening of the hous ing as well as through the central opening of the bolt-plate to be caused to circumscribe approximately semi-circles inopposite directions whereby one of the corresponding ends thereof will pass into the two side openings of the bolt-plate so that all pull or pressure on the locking elementswill be directed on their parts exteriorly of I the housing.

Other objects of the invention areto pro: vide in the housing mechanism for guiding the locking elements circumferentially; to provide a releasing element for operating form of lock which may be madeto combine great strength and durability. j

A practical embodiment of the invention is represented in theaccompanying drawing forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views, the said invention being more fully described hereinafter, and then pointedout in the claims at the end of the description.

In the drawings, Figure 1 is an elevation of a door hinged to a frame with one form of lock embodying my invention applied thereto. Fig. 2 is a top plan of the housing of the lock with one of the walls removed therefrom to show the operative mechanism with the locking bolts in unlocked positions. Fig. 3 is also a top plan of the lock showing the operative mechanism when operated so that the locking bolts are 'in engagement with the bolt-plate. Fig. 4 is a sectional View, partly in detail, taken on the line IVIV of Fig. 2. Fig. 5 is a sectional view, partly in detail, taken on the line VV ofFig. 2,and Fig. 6 is a perspective view of the bolt-plate used in the lock.

The lock has a housing 10 which may be square, or substantially rectangular, or any other suitable size and shape for being fastened on a door, as 11, or the like so that the front wall, as 12, will be adjacent to or flush with the free edge ofone of the stiles ofthe door, and through this end wall of the housing is an opening 13 communicating with the interior of the housing. The lock also has a bolt-plate, as 14, which is preferably substantially rectangular in shape, and on one edge of this bolt-plate may be a right-angularly disposed recessed extension, as 15, while through the bolt-plate proper are three alined openings 16, 17 18. The apertured bolt-plate 14 in practice is fastened on the jamb, or frame, as 19, of the door so that its central opening 17 will be in alinement with the opening 13 of the housing 10 when the door is closed.

In the housing 10 are two locking elements, or bolts 20 and 21 each of which is substantially three-quarters of a circle in shape. The bolts 20 and 21 are arranged in the housing 10 so that one of the corresponding ends thereof is normally disposed in the opening 13 of the housing, and so that the curvatureofthe parts of the bolts interiorly of the housing are disposed in opposite directions for the second ends to be positioned adjacent to the junctures of the end wall 12 with the side walls of the housing. The second ends of the bolts 20 and 21 may be enlarged, as at 22 and 2 3, and these enlarged parts are of less widths than the widths of the other portions of-the bolts to provide shoulders, or stops, as 24 and 25.

or bolts 20 and 21 circumferentially in uni- 21 so as to be moved back and forth relatively to the opening 13 of the end wall 12 of the housing, and contiguous to one end of the bar in a part opposite to the locking bolts 2Q and 21 is a recess 30. To one end of the movable bar 29 is pivoted, at 31, one end of a link, or eccentric 32 having its other end pivoted, at 33, to the enlarged part 22 of the locking bolt 20 eccentrically with relation to the pivot 26, and to the other end of the movable bar 29 is pivoted, at 34, one end of a second link, or eccentric 35 having its second end pivoted, at36, to the enlarged part 23 of the locking bolt, 21 eccentrically with respect to the pivot 27. Projecting toward the rear wall of the housing from the end of the bar 29 to which is pivoted the link 32 is a plate 37 with a pin 38 extending from its central part, and on the free end of this plate is a triangularly disposed part 39 terminating with a laterally disposed flange, orlug 40 arranged on an incline relatively to the bar 29. Extending in a similar direction from the other end of the bar 29 is a second plate 41, and this plate together with the plate 37 serve as guides to cause the bar 29 to move accurately in the housing 10. Also projecting from the bar 29 in spaced relation to the guide plate 37 and adjacent to the recess 30'of the bar, is a finger 42 which terminates with a laterally extending flange 43 in spaced opposed relation to the inclined flange 40 of the guide plate 37 ,and the flange 43 is disposed on an incline diverging from the flange 40, as shown. By arranging the flanges 40 and 43 in this manner one of the corresponding ends thereof are in slightly spaced relation, as at 43, and from one of the walls of the housing is a pin, or stop, as 44, projecting normally through the recess 30 of the bar 29. On the triangularly disposed part 39 of the guide plate 37 is pivoted, at 45, one end of a lever, or retaining element, as 46, which is disposed toward the front wall 12 of the housing, and this lever is of a length so that its free end rests against the stop 44. Extending from the lever 46 is a lug 47 which is movably disposed through the space 43 between the flanges 40 and 43 of the plate 37 and of the finger 42, and also extending from the lever 46 is a second lug 48 inomovable contact with the stop 44. 'To the'pivoted end of the lever 46 is secured one end of a spring 49 disposed so that its other end movably abuts against the pin 38 of the guide plate 37, and this spring normally serves to force the lever 46 into contact with the stop 44 and so that the lug 47 will be seated in the space 43 between the inclined flanges 40 and 43 when the operative mechanism 28 is not actuated to guide the locking bolts 20 and 21 outwardly of tne housing through its opening 13.

'i'he spring actuated lever. or retaining element 46 with its lug 47 disposed in the space 43' and its lug 48 abutting against the stop 44 serves to prevent the mechanism from being operated, and for the purpose of freeing this engagement of thelever with these parts of the mechanism as well as for operating the mechanism to swing the bolts 20 and 21 outwardly and inwardly of the housing, a releasing element, or bar, as 50, is provided. The releasing element, or bar 50 is preferably substantially elliptic in shape to provide two oppositely extending curved ends, as 51. and 52, and the central part of this member is pivoted to a stud, or short shaft 53 which is rotatable in one of the walls of the housing so that one of the curved ends of the releasing element when rotated accordingly will be moved between the inclined flanges 40 and 43 of the plate 37 and the finger 42 so as to contact with the lug 48 of the spring actuated lever 46.- Projecting from the releasing element 50 are two spaced pins 54 and 55 one or both of which are adapted to be releasably engaged by the free end part of a spring, as 56,'having its other end held, at 57, to the housing for the spring to serve to force this element toward the lever 46. The releasing element 50 may be rotatably moved by any suitable means ap plied to its shaft 53, such as a key-operative tumbler barrel of any well knownmake of lock, .or other desired means, though in the drawings I show the shaft and thereleasing element as being operable by a manually revoluble knob, as 58, which is fixed on the shaft 53 exteriorly of the housing 10.

W hen the lock is employed for instance with a door the housing 10 is fastened on the door so that its front plate 12 will be flush with one edge of the door, as shown in Fig. 1, and the bolt-plate is applied .to the frame of the door in opposed relation to the front plate of the housing for the central opening 17 of the bolt-plate to be in alinement with the opening 13 of the housing when the door is closed. To operate the mechanism 28 for guiding the bolts 20 and 21 into locking engagement with the bolt-plate 14 the releasing element 50 .is

rotatably moved accordingly by revolubly moving the shaft 53 by a key or otherwise,

or by manually rotating the knob 58. WVhen one of the curved ends .51 and 52 of the elliptic releasing elementis guided toward the front wall of the housing the end of the releasing element will pass'between the flanges 40 and 43 of the plate 37 and .of thefinger 42 for contacting with the lug 47 of the spring actuated lever 46. This lever will then be swung so that the lug will be guided out of the space 43 and so that the lug 48 of the lever will be freed from engagement with the stop 44. The continued rotation of the releasing element 50 will cause the same end thereof to engage the flange 43 of the finger 42, and the bar 29 will in turn be moved toward the front plate 12 of the housing. This movement of the bar 29 will also direct the links 32 and 35 to swing the bolts 20 and 21 in unison outwardly of the opening 13 of the front wall 12 of the housing for being guided through the central opening 17 of the boltplate 14 in a manner to circumscribe approximately semi-circles in opposite directions. The free ends of the bolts, or looking elements 20 and 21 will then be disposed in the recess of the extension 15 of the boltplate as well as being seated in the openings 16 and 18 of the bolt-plate. By pro viding the bolt-plate 14 with the recessed extension 15 for receiving the bolts 20 and 21 in this fashion it will be very difficult to gain access to the bolts when the door is locked. Moreover, by forming the locking elements, or bolts 20 and 21 of substantially three-quarters of circles in shapes, and causing the bolts to be moved in the radius of semi-circles to engage the bolt-plate any pull, or pressure thereon for the purpose of surreptitiously opening the lock will be directed on the parts of the bolts exteriorly of the housing. Thus saving intact the operative mechanism 25, it being presumed that the bolts are made sufficiently strong to withstand great pressure. When it is desired to unlock the door, the knob 58 is reversely rotated, and the end of the releasing element 50 will be moved from engagement with the flange 43 of the finger During the further rotation of the releasing element its end will contact with the flange 40 of the plate 37 which will then be guided rearwardly of the housing for likewise moving the bar 29, and the bolts 20 and 21 will thereby be reversely swung inwardly of the housing to free their engagement with the bolt-plate 14.

In the foregoing description, I have embodied the preferred form of my invention, but I do not wish to be understood as limiting myself thereto, as I am aware that modifications may be made therein without departing from the principle, or sacrificing any of the advantages of this invention, therefore I reserve to myself the right to make such changes as fairly fall within the scope thereof.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a look, a housing, a pair of bolts mounted in said housing, a bar slidably mounted in said housing and secured to said bolts, a slotted plate attached to said bar and having a cut-away portion adjacent said slot, a lug on said housing and projecting through said slotted plate, a retainer on said plate engaging said lug and having an abutment thereon adapted to pass over said cutaway portion of said slotted plate, and means mounted in said housing adapted to be rotated into engagement with said abutment and move same laterally to release said retainer from said lug, said releasing means also being adapted to engage said plate and move same laterally, thereby causing said bolts to move into locking position, substantially as described.

2. In a lock, a housing, a pair of bolts mounted in said housing, a bar slidably secured in said housing, links connecting said bar and said bolts, a slotted plate attached to said bar and having a cut-away portion adjacent said slot, a lug on said housing and projecting through said slotted plate, a retainer pivotally secured to said plate and having one end resiliently engaging said lug and having an abutment thereon adapted to pass over said cut-away portion of said slotted plate, and releasing means mounted in said housing adapted to engage said abutment and disengage said retainer from said lug and also engage said plate and move same laterally, thereby moving said bolts into locking position, substantially as described.

JOSEPH KAUFMAN.

Witnesses: RoB'r. B. ABBOTT, I-I. CITRET.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. G. 

